**Core Concept**
Fibrous joints, also known as synarthrodial joints, are immovable or slightly movable joints that are connected by dense fibrous connective tissue. They are characterized by a lack of a synovial cavity and are typically found in areas where movement is not necessary, such as the sutures of the skull.

**Why the Correct Answer is Right**
The correct answer is the option that does not fit with the characteristics of a fibrous joint. Fibrous joints are typically immovable or have limited movement, and are connected by dense fibrous tissue. They often do not have a synovial cavity and are found in areas where movement is not necessary.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is a type of fibrous joint, specifically a suture joint, which is found in the skull and is immovable.
**Option B:** This option is a type of fibrous joint, specifically a syndesmosis, which is a type of fibrous joint that allows for limited movement.
**Option C:** This option is a type of synovial joint, specifically a ball-and-socket joint, which is a freely movable joint that has a synovial cavity.

**Clinical Pearl / High-Yield Fact**
It's essential to remember the different types of joints and their characteristics, as this knowledge is crucial for understanding various medical conditions and performing physical examinations.

**Correct Answer: C. Ball-and-socket joint.**